diff options
Diffstat (limited to 'drivers/char/drm/via_verifier.c')
| -rw-r--r-- | drivers/char/drm/via_verifier.c | 1061 |
1 files changed, 1061 insertions, 0 deletions
diff --git a/drivers/char/drm/via_verifier.c b/drivers/char/drm/via_verifier.c new file mode 100644 index 0000000..07923b0 --- /dev/null +++ b/drivers/char/drm/via_verifier.c @@ -0,0 +1,1061 @@ +/* + * Copyright 2004 The Unichrome Project. All Rights Reserved. + * Copyright 2005 Thomas Hellstrom. All Rights Reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sub license, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice (including the + * next paragraph) shall be included in all copies or substantial portions + * of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL + * THE AUTHOR(S), AND/OR THE COPYRIGHT HOLDER(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR + * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, + * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER + * DEALINGS IN THE SOFTWARE. + * + * Author: Thomas Hellstrom 2004, 2005. + * This code was written using docs obtained under NDA from VIA Inc. + * + * Don't run this code directly on an AGP buffer. Due to cache problems it will + * be very slow. + */ + + +#include "via_3d_reg.h" +#include "drmP.h" +#include "drm.h" +#include "via_drm.h" +#include "via_verifier.h" +#include "via_drv.h" + +typedef enum{ + state_command, + state_header2, + state_header1, + state_vheader5, + state_vheader6, + state_error +} verifier_state_t; + + +typedef enum{ + no_check = 0, + check_for_header2, + check_for_header1, + check_for_header2_err, + check_for_header1_err, + check_for_fire, + check_z_buffer_addr0, + check_z_buffer_addr1, + check_z_buffer_addr_mode, + check_destination_addr0, + check_destination_addr1, + check_destination_addr_mode, + check_for_dummy, + check_for_dd, + check_texture_addr0, + check_texture_addr1, + check_texture_addr2, + check_texture_addr3, + check_texture_addr4, + check_texture_addr5, + check_texture_addr6, + check_texture_addr7, + check_texture_addr8, + check_texture_addr_mode, + check_for_vertex_count, + check_number_texunits, + forbidden_command +}hazard_t; + +/* + * Associates each hazard above with a possible multi-command + * sequence. For example an address that is split over multiple + * commands and that needs to be checked at the first command + * that does not include any part of the address. + */ + +static drm_via_sequence_t seqs[] = { + no_sequence, + no_sequence, + no_sequence, + no_sequence, + no_sequence, + no_sequence, + z_address, + z_address, + z_address, + dest_address, + dest_address, + dest_address, + no_sequence, + no_sequence, + tex_address, + tex_address, + tex_address, + tex_address, + tex_address, + tex_address, + tex_address, + tex_address, + tex_address, + tex_address, + no_sequence +}; + +typedef struct{ + unsigned int code; + hazard_t hz; +} hz_init_t; + + + +static hz_init_t init_table1[] = { + {0xf2, check_for_header2_err}, + {0xf0, check_for_header1_err}, + {0xee, check_for_fire}, + {0xcc, check_for_dummy}, + {0xdd, check_for_dd}, + {0x00, no_check}, + {0x10, check_z_buffer_addr0}, + {0x11, check_z_buffer_addr1}, + {0x12, check_z_buffer_addr_mode}, + {0x13, no_check}, + {0x14, no_check}, + {0x15, no_check}, + {0x23, no_check}, + {0x24, no_check}, + {0x33, no_check}, + {0x34, no_check}, + {0x35, no_check}, + {0x36, no_check}, + {0x37, no_check}, + {0x38, no_check}, + {0x39, no_check}, + {0x3A, no_check}, + {0x3B, no_check}, + {0x3C, no_check}, + {0x3D, no_check}, + {0x3E, no_check}, + {0x40, check_destination_addr0}, + {0x41, check_destination_addr1}, + {0x42, check_destination_addr_mode}, + {0x43, no_check}, + {0x44, no_check}, + {0x50, no_check}, + {0x51, no_check}, + {0x52, no_check}, + {0x53, no_check}, + {0x54, no_check}, + {0x55, no_check}, + {0x56, no_check}, + {0x57, no_check}, + {0x58, no_check}, + {0x70, no_check}, + {0x71, no_check}, + {0x78, no_check}, + {0x79, no_check}, + {0x7A, no_check}, + {0x7B, no_check}, + {0x7C, no_check}, + {0x7D, check_for_vertex_count} +}; + + + +static hz_init_t init_table2[] = { + {0xf2, check_for_header2_err}, + {0xf0, check_for_header1_err}, + {0xee, check_for_fire}, + {0xcc, check_for_dummy}, + {0x00, check_texture_addr0}, + {0x01, check_texture_addr0}, + {0x02, check_texture_addr0}, + {0x03, check_texture_addr0}, + {0x04, check_texture_addr0}, + {0x05, check_texture_addr0}, + {0x06, check_texture_addr0}, + {0x07, check_texture_addr0}, + {0x08, check_texture_addr0}, + {0x09, check_texture_addr0}, + {0x20, check_texture_addr1}, + {0x21, check_texture_addr1}, + {0x22, check_texture_addr1}, + {0x23, check_texture_addr4}, + {0x2B, check_texture_addr3}, + {0x2C, check_texture_addr3}, + {0x2D, check_texture_addr3}, + {0x2E, check_texture_addr3}, + {0x2F, check_texture_addr3}, + {0x30, check_texture_addr3}, + {0x31, check_texture_addr3}, + {0x32, check_texture_addr3}, + {0x33, check_texture_addr3}, + {0x34, check_texture_addr3}, + {0x4B, check_texture_addr5}, + {0x4C, check_texture_addr6}, + {0x51, check_texture_addr7}, + {0x52, check_texture_addr8}, + {0x77, check_texture_addr2}, + {0x78, no_check}, + {0x79, no_check}, + {0x7A, no_check}, + {0x7B, check_texture_addr_mode}, + {0x7C, no_check}, + {0x7D, no_check}, + {0x7E, no_check}, + {0x7F, no_check}, + {0x80, no_check}, + {0x81, no_check}, + {0x82, no_check}, + {0x83, no_check}, + {0x85, no_check}, + {0x86, no_check}, + {0x87, no_check}, + {0x88, no_check}, + {0x89, no_check}, + {0x8A, no_check}, + {0x90, no_check}, + {0x91, no_check}, + {0x92, no_check}, + {0x93, no_check} +}; + +static hz_init_t init_table3[] = { + {0xf2, check_for_header2_err}, + {0xf0, check_for_header1_err}, + {0xcc, check_for_dummy}, + {0x00, check_number_texunits} +}; + + +static hazard_t table1[256]; +static hazard_t table2[256]; +static hazard_t table3[256]; + + + +static __inline__ int +eat_words(const uint32_t **buf, const uint32_t *buf_end, unsigned num_words) +{ + if ((*buf - buf_end) >= num_words) { + *buf += num_words; + return 0; + } + DRM_ERROR("Illegal termination of DMA command buffer\n"); + return 1; +} + + +/* + * Partially stolen from drm_memory.h + */ + +static __inline__ drm_map_t * +via_drm_lookup_agp_map (drm_via_state_t *seq, unsigned long offset, unsigned long size, + drm_device_t *dev) +{ + struct list_head *list; + drm_map_list_t *r_list; + drm_map_t *map = seq->map_cache; + + if (map && map->offset <= offset && (offset + size) <= (map->offset + map->size)) { + return map; + } + + list_for_each(list, &dev->maplist->head) { + r_list = (drm_map_list_t *) list; + map = r_list->map; + if (!map) + continue; + if (map->offset <= offset && (offset + size) <= (map->offset + map->size) && + !(map->flags & _DRM_RESTRICTED) && (map->type == _DRM_AGP)) { + seq->map_cache = map; + return map; + } + } + return NULL; +} + + +/* + * Require that all AGP texture levels reside in the same AGP map which should + * be mappable by the client. This is not a big restriction. + * FIXME: To actually enforce this security policy strictly, drm_rmmap + * would have to wait for dma quiescent before removing an AGP map. + * The via_drm_lookup_agp_map call in reality seems to take + * very little CPU time. + */ + + +static __inline__ int +finish_current_sequence(drm_via_state_t *cur_seq) +{ + switch(cur_seq->unfinished) { + case z_address: + DRM_DEBUG("Z Buffer start address is 0x%x\n", cur_seq->z_addr); + break; + case dest_address: + DRM_DEBUG("Destination start address is 0x%x\n", cur_seq->d_addr); + break; + case tex_address: + if (cur_seq->agp_texture) { + unsigned start = cur_seq->tex_level_lo[cur_seq->texture]; + unsigned end = cur_seq->tex_level_hi[cur_seq->texture]; + unsigned long lo=~0, hi=0, tmp; + uint32_t *addr, *pitch, *height, tex; + unsigned i; + + if (end > 9) end = 9; + if (start > 9) start = 9; + + addr =&(cur_seq->t_addr[tex = cur_seq->texture][start]); + pitch = &(cur_seq->pitch[tex][start]); + height = &(cur_seq->height[tex][start]); + + for (i=start; i<= end; ++i) { + tmp = *addr++; + if (tmp < lo) lo = tmp; + tmp += (*height++ << *pitch++); + if (tmp > hi) hi = tmp; + } + + if (! via_drm_lookup_agp_map (cur_seq, lo, hi - lo, cur_seq->dev)) { + DRM_ERROR("AGP texture is not in allowed map\n"); + return 2; + } + } + break; + default: + break; + } + cur_seq->unfinished = no_sequence; + return 0; +} + +static __inline__ int +investigate_hazard( uint32_t cmd, hazard_t hz, drm_via_state_t *cur_seq) +{ + register uint32_t tmp, *tmp_addr; + + if (cur_seq->unfinished && (cur_seq->unfinished != seqs[hz])) { + int ret; + if ((ret = finish_current_sequence(cur_seq))) return ret; + } + + switch(hz) { + case check_for_header2: + if (cmd == HALCYON_HEADER2) return 1; + return 0; + case check_for_header1: + if ((cmd & HALCYON_HEADER1MASK) == HALCYON_HEADER1) return 1; + return 0; + case check_for_header2_err: + if (cmd == HALCYON_HEADER2) return 1; + DRM_ERROR("Illegal DMA HALCYON_HEADER2 command\n"); + break; + case check_for_header1_err: + if ((cmd & HALCYON_HEADER1MASK) == HALCYON_HEADER1) return 1; + DRM_ERROR("Illegal DMA HALCYON_HEADER1 command\n"); + break; + case check_for_fire: + if ((cmd & HALCYON_FIREMASK) == HALCYON_FIRECMD) return 1; + DRM_ERROR("Illegal DMA HALCYON_FIRECMD command\n"); + break; + case check_for_dummy: + if (HC_DUMMY == cmd) return 0; + DRM_ERROR("Illegal DMA HC_DUMMY command\n"); + break; + case check_for_dd: + if (0xdddddddd == cmd) return 0; + DRM_ERROR("Illegal DMA 0xdddddddd command\n"); + break; + case check_z_buffer_addr0: + cur_seq->unfinished = z_address; + cur_seq->z_addr = (cur_seq->z_addr & 0xFF000000) | + (cmd & 0x00FFFFFF); + return 0; + case check_z_buffer_addr1: + cur_seq->unfinished = z_address; + cur_seq->z_addr = (cur_seq->z_addr & 0x00FFFFFF) | + ((cmd & 0xFF) << 24); + return 0; + case check_z_buffer_addr_mode: + cur_seq->unfinished = z_address; + if ((cmd & 0x0000C000) == 0) return 0; + DRM_ERROR("Attempt to place Z buffer in system memory\n"); + return 2; + case check_destination_addr0: + cur_seq->unfinished = dest_address; + cur_seq->d_addr = (cur_seq->d_addr & 0xFF000000) | + (cmd & 0x00FFFFFF); + return 0; + case check_destination_addr1: + cur_seq->unfinished = dest_address; + cur_seq->d_addr = (cur_seq->d_addr & 0x00FFFFFF) | + ((cmd & 0xFF) << 24); + return 0; + case check_destination_addr_mode: + cur_seq->unfinished = dest_address; + if ((cmd & 0x0000C000) == 0) return 0; + DRM_ERROR("Attempt to place 3D drawing buffer in system memory\n"); + return 2; + case check_texture_addr0: + cur_seq->unfinished = tex_address; + tmp = (cmd >> 24); + tmp_addr = &cur_seq->t_addr[cur_seq->texture][tmp]; + *tmp_addr = (*tmp_addr & 0xFF000000) | (cmd & 0x00FFFFFF); + return 0; + case check_texture_addr1: + cur_seq->unfinished = tex_address; + tmp = ((cmd >> 24) - 0x20); + tmp += tmp << 1; + tmp_addr = &cur_seq->t_addr[cur_seq->texture][tmp]; + *tmp_addr = (*tmp_addr & 0x00FFFFFF) | ((cmd & 0xFF) << 24); + tmp_addr++; + *tmp_addr = (*tmp_addr & 0x00FFFFFF) | ((cmd & 0xFF00) << 16); + tmp_addr++; + *tmp_addr = (*tmp_addr & 0x00FFFFFF) | ((cmd & 0xFF0000) << 8); + return 0; + case check_texture_addr2: + cur_seq->unfinished = tex_address; + cur_seq->tex_level_lo[tmp = cur_seq->texture] = cmd & 0x3F; + cur_seq->tex_level_hi[tmp] = (cmd & 0xFC0) >> 6; + return 0; + case check_texture_addr3: + cur_seq->unfinished = tex_address; + tmp = ((cmd >> 24) - 0x2B); + cur_seq->pitch[cur_seq->texture][tmp] = (cmd & 0x00F00000) >> 20; + if (!tmp && (cmd & 0x000FFFFF)) { + DRM_ERROR("Unimplemented texture level 0 pitch mode.\n"); + return 2; + } + return 0; + case check_texture_addr4: + cur_seq->unfinished = tex_address; + tmp_addr = &cur_seq->t_addr[cur_seq->texture][9]; + *tmp_addr = (*tmp_addr & 0x00FFFFFF) | ((cmd & 0xFF) << 24); + return 0; + case check_texture_addr5: + case check_texture_addr6: + cur_seq->unfinished = tex_address; + /* + * Texture width. We don't care since we have the pitch. + */ + return 0; + case check_texture_addr7: + cur_seq->unfinished = tex_address; + tmp_addr = &(cur_seq->height[cur_seq->texture][0]); + tmp_addr[5] = 1 << ((cmd & 0x00F00000) >> 20); + tmp_addr[4] = 1 << ((cmd & 0x000F0000) >> 16); + tmp_addr[3] = 1 << ((cmd & 0x0000F000) >> 12); + tmp_addr[2] = 1 << ((cmd & 0x00000F00) >> 8); + tmp_addr[1] = 1 << ((cmd & 0x000000F0) >> 4); + tmp_addr[0] = 1 << (cmd & 0x0000000F); + return 0; + case check_texture_addr8: + cur_seq->unfinished = tex_address; + tmp_addr = &(cur_seq->height[cur_seq->texture][0]); + tmp_addr[9] = 1 << ((cmd & 0x0000F000) >> 12); + tmp_addr[8] = 1 << ((cmd & 0x00000F00) >> 8); + tmp_addr[7] = 1 << ((cmd & 0x000000F0) >> 4); + tmp_addr[6] = 1 << (cmd & 0x0000000F); + return 0; + case check_texture_addr_mode: + cur_seq->unfinished = tex_address; + if ( 2 == (tmp = cmd & 0x00000003)) { + DRM_ERROR("Attempt to fetch texture from system memory.\n"); + return 2; + } + cur_seq->agp_texture = (tmp == 3); + cur_seq->tex_palette_size[cur_seq->texture] = + (cmd >> 16) & 0x000000007; + return 0; + case check_for_vertex_count: + cur_seq->vertex_count = cmd & 0x0000FFFF; + return 0; + case check_number_texunits: + cur_seq->multitex = (cmd >> 3) & 1; + return 0; + default: + DRM_ERROR("Illegal DMA data: 0x%x\n", cmd); + return 2; + } + return 2; +} + + +static __inline__ int +via_check_prim_list(uint32_t const **buffer, const uint32_t *buf_end, + drm_via_state_t *cur_seq) +{ + drm_via_private_t *dev_priv = (drm_via_private_t *) cur_seq->dev->dev_private; + uint32_t a_fire, bcmd , dw_count; + int ret = 0; + int have_fire; + const uint32_t *buf = *buffer; + + while(buf < buf_end) { + have_fire = 0; + if ((buf_end - buf) < 2) { + DRM_ERROR("Unexpected termination of primitive list.\n"); + ret = 1; + break; + } + if ((*buf & HC_ACMD_MASK) != HC_ACMD_HCmdB) break; + bcmd = *buf++; + if ((*buf & HC_ACMD_MASK) != HC_ACMD_HCmdA) { + DRM_ERROR("Expected Vertex List A command, got 0x%x\n", + *buf); + ret = 1; + break; + } + a_fire = *buf++ | HC_HPLEND_MASK | HC_HPMValidN_MASK | HC_HE3Fire_MASK; + + /* + * How many dwords per vertex ? + */ + + if (cur_seq->agp && ((bcmd & (0xF << 11)) == 0)) { + DRM_ERROR("Illegal B command vertex data for AGP.\n"); + ret = 1; + break; + } + + dw_count = 0; + if (bcmd & (1 << 7)) dw_count += (cur_seq->multitex) ? 2:1; + if (bcmd & (1 << 8)) dw_count += (cur_seq->multitex) ? 2:1; + if (bcmd & (1 << 9)) dw_count++; + if (bcmd & (1 << 10)) dw_count++; + if (bcmd & (1 << 11)) dw_count++; + if (bcmd & (1 << 12)) dw_count++; + if (bcmd & (1 << 13)) dw_count++; + if (bcmd & (1 << 14)) dw_count++; + + while(buf < buf_end) { + if (*buf == a_fire) { + if (dev_priv->num_fire_offsets >= VIA_FIRE_BUF_SIZE) { + DRM_ERROR("Fire offset buffer full.\n"); + ret = 1; + break; + } + dev_priv->fire_offsets[dev_priv->num_fire_offsets++] = buf; + have_fire = 1; + buf++; + if (buf < buf_end && *buf == a_fire) + buf++; + break; + } + if ((*buf == HALCYON_HEADER2) || + ((*buf & HALCYON_FIREMASK) == HALCYON_FIRECMD)) { + DRM_ERROR("Missing Vertex Fire command, " + "Stray Vertex Fire command or verifier " + "lost sync.\n"); + ret = 1; + break; + } + if ((ret = eat_words(&buf, buf_end, dw_count))) + break; + } + if (buf >= buf_end && !have_fire) { + DRM_ERROR("Missing Vertex Fire command or verifier " + "lost sync.\n"); + ret = 1; + break; + } + if (cur_seq->agp && ((buf - cur_seq->buf_start) & 0x01)) { + DRM_ERROR("AGP Primitive list end misaligned.\n"); + ret = 1; + break; + } + } + *buffer = buf; + return ret; +} + + + + + +static __inline__ verifier_state_t +via_check_header2( uint32_t const **buffer, const uint32_t *buf_end, + drm_via_state_t *hc_state) +{ + uint32_t cmd; + int hz_mode; + hazard_t hz; + const uint32_t *buf = *buffer; + const hazard_t *hz_table; + + + if ((buf_end - buf) < 2) { + DRM_ERROR("Illegal termination of DMA HALCYON_HEADER2 sequence.\n"); + return state_error; + } + buf++; + cmd = (*buf++ & 0xFFFF0000) >> 16; + + switch(cmd) { + case HC_ParaType_CmdVdata: + if (via_check_prim_list(&buf, buf_end, hc_state )) + return state_error; + *buffer = buf; + return state_command; + case HC_ParaType_NotTex: + hz_table = table1; + break; + case HC_ParaType_Tex: + hc_state->texture = 0; + hz_table = table2; + break; + case (HC_ParaType_Tex | (HC_SubType_Tex1 << 8)): + hc_state->texture = 1; + hz_table = table2; + break; + case (HC_ParaType_Tex | (HC_SubType_TexGeneral << 8)): + hz_table = table3; + break; + case HC_ParaType_Auto: + if (eat_words(&buf, buf_end, 2)) + return state_error; + *buffer = buf; + return state_command; + case (HC_ParaType_Palette | (HC_SubType_Stipple << 8)): + if (eat_words(&buf, buf_end, 32)) + return state_error; + *buffer = buf; + return state_command; + case (HC_ParaType_Palette | (HC_SubType_TexPalette0 << 8)): + case (HC_ParaType_Palette | (HC_SubType_TexPalette1 << 8)): + DRM_ERROR("Texture palettes are rejected because of " + "lack of info how to determine their size.\n"); + return state_error; + case (HC_ParaType_Palette | (HC_SubType_FogTable << 8)): + DRM_ERROR("Fog factor palettes are rejected because of " + "lack of info how to determine their size.\n"); + return state_error; + default: + + /* + * There are some unimplemented HC_ParaTypes here, that + * need to be implemented if the Mesa driver is extended. + */ + + DRM_ERROR("Invalid or unimplemented HALCYON_HEADER2 " + "DMA subcommand: 0x%x. Previous dword: 0x%x\n", + cmd, *(buf -2)); + *buffer = buf; + return state_error; + } + + while(buf < buf_end) { + cmd = *buf++; + if ((hz = hz_table[cmd >> 24])) { + if ((hz_mode = investigate_hazard(cmd, hz, hc_state))) { + if (hz_mode == 1) { + buf--; + break; + } + return state_error; + } + } else if (hc_state->unfinished && + finish_current_sequence(hc_state)) { + return state_error; + } + } + if (hc_state->unfinished && finish_current_sequence(hc_state)) { + return state_error; + } + *buffer = buf; + return state_command; +} + +static __inline__ verifier_state_t +via_parse_header2( drm_via_private_t *dev_priv, uint32_t const **buffer, const uint32_t *buf_end, + int *fire_count) +{ + uint32_t cmd; + const uint32_t *buf = *buffer; + const uint32_t *next_fire; + int burst = 0; + + next_fire = dev_priv->fire_offsets[*fire_count]; + buf++; + cmd = (*buf & 0xFFFF0000) >> 16; + VIA_WRITE(HC_REG_TRANS_SET + HC_REG_BASE, *buf++); + switch(cmd) { + case HC_ParaType_CmdVdata: + while ((buf < buf_end) && + (*fire_count < dev_priv->num_fire_offsets) && + (*buf & HC_ACMD_MASK) == HC_ACMD_HCmdB ) { + while(buf <= next_fire) { + VIA_WRITE(HC_REG_TRANS_SPACE + HC_REG_BASE + (burst & 63), *buf++); + burst += 4; + } + if ( ( buf < buf_end ) && ((*buf & HALCYON_FIREMASK) == HALCYON_FIRECMD)) + buf++; + + if (++(*fire_count) < dev_priv->num_fire_offsets) + next_fire = dev_priv->fire_offsets[*fire_count]; + } + break; + default: + while(buf < buf_end) { + + if ( *buf == HC_HEADER2 || + (*buf & HALCYON_HEADER1MASK) == HALCYON_HEADER1 || + (*buf & VIA_VIDEOMASK) == VIA_VIDEO_HEADER5 || + (*buf & VIA_VIDEOMASK) == VIA_VIDEO_HEADER6 ) break; + + VIA_WRITE(HC_REG_TRANS_SPACE + HC_REG_BASE + (burst & 63), *buf++); + burst +=4; + } + } + *buffer = buf; + return state_command; +} + + + +static __inline__ int +verify_mmio_address( uint32_t address) +{ + if ((address > 0x3FF) && (address < 0xC00 )) { + DRM_ERROR("Invalid VIDEO DMA command. " + "Attempt to access 3D- or command burst area.\n"); + return 1; + } else if ((address > 0xCFF) && (address < 0x1300)) { + DRM_ERROR("Invalid VIDEO DMA command. " + "Attempt to access PCI DMA area.\n"); + return 1; + } else if (address > 0x13FF ) { + DRM_ERROR("Invalid VIDEO DMA command. " + "Attempt to access VGA registers.\n"); + return 1; + } + return 0; +} + +static __inline__ int +verify_video_tail( uint32_t const **buffer, const uint32_t *buf_end, uint32_t dwords) +{ + const uint32_t *buf = *buffer; + + if (buf_end - buf < dwords) { + DRM_ERROR("Illegal termination of video command.\n"); + return 1; + } + while (dwords--) { + if (*buf++) { + DRM_ERROR("Illegal video command tail.\n"); + return 1; + } + } + *buffer = buf; + return 0; +} + + +static __inline__ verifier_state_t +via_check_header1( uint32_t const **buffer, const uint32_t *buf_end ) +{ + uint32_t cmd; + const uint32_t *buf = *buffer; + verifier_state_t ret = state_command; + + while (buf < buf_end) { + cmd = *buf; + if ((cmd > ((0x3FF >> 2) | HALCYON_HEADER1)) && + (cmd < ((0xC00 >> 2) | HALCYON_HEADER1))) { + if ((cmd & HALCYON_HEADER1MASK) != HALCYON_HEADER1) + break; + DRM_ERROR("Invalid HALCYON_HEADER1 command. " + "Attempt to access 3D- or command burst area.\n"); + ret = state_error; + break; + } else if (cmd > ((0xCFF >> 2) | HALCYON_HEADER1)) { + if ((cmd & HALCYON_HEADER1MASK) != HALCYON_HEADER1) + break; + DRM_ERROR("Invalid HALCYON_HEADER1 command. " + "Attempt to access VGA registers.\n"); + ret = state_error; + break; + } else { + buf += 2; + } + } + *buffer = buf; + return ret; +} + +static __inline__ verifier_state_t +via_parse_header1( drm_via_private_t *dev_priv, uint32_t const **buffer, const uint32_t *buf_end ) +{ + register uint32_t cmd; + const uint32_t *buf = *buffer; + + while (buf < buf_end) { + cmd = *buf; + if ((cmd & HALCYON_HEADER1MASK) != HALCYON_HEADER1) break; + VIA_WRITE( (cmd & ~HALCYON_HEADER1MASK) << 2, *++buf); + buf++; + } + *buffer = buf; + return state_command; +} + +static __inline__ verifier_state_t +via_check_vheader5( uint32_t const **buffer, const uint32_t *buf_end ) +{ + uint32_t data; + const uint32_t *buf = *buffer; + + if (buf_end - buf < 4) { + DRM_ERROR("Illegal termination of video header5 command\n"); + return state_error; + } + + data = *buf++ & ~VIA_VIDEOMASK; + if (verify_mmio_address(data)) + return state_error; + + data = *buf++; + if (*buf++ != 0x00F50000) { + DRM_ERROR("Illegal header5 header data\n"); + return state_error; + } + if (*buf++ != 0x00000000) { + DRM_ERROR("Illegal header5 header data\n"); + return state_error; + } + if (eat_words(&buf, buf_end, data)) + return state_error; + if ((data & 3) && verify_video_tail(&buf, buf_end, 4 - (data & 3))) + return state_error; + *buffer = buf; + return state_command; + +} + +static __inline__ verifier_state_t +via_parse_vheader5( drm_via_private_t *dev_priv, uint32_t const **buffer, const uint32_t *buf_end ) +{ + uint32_t addr, count, i; + const uint32_t *buf = *buffer; + + addr = *buf++ & ~VIA_VIDEOMASK; + i = count = *buf; + buf += 3; + while(i--) { + VIA_WRITE(addr, *buf++); + } + if (count & 3) buf += 4 - (count & 3); + *buffer = buf; + return state_command; +} + + +static __inline__ verifier_state_t +via_check_vheader6( uint32_t const **buffer, const uint32_t *buf_end ) +{ + uint32_t data; + const uint32_t *buf = *buffer; + uint32_t i; + + + if (buf_end - buf < 4) { + DRM_ERROR("Illegal termination of video header6 command\n"); + return state_error; + } + buf++; + data = *buf++; + if (*buf++ != 0x00F60000) { + DRM_ERROR("Illegal header6 header data\n"); + return state_error; + } + if (*buf++ != 0x00000000) { + DRM_ERROR("Illegal header6 header data\n"); + return state_error; + } + if ((buf_end - buf) < (data << 1)) { + DRM_ERROR("Illegal termination of video header6 command\n"); + return state_error; + } + for (i=0; i<data; ++i) { + if (verify_mmio_address(*buf++)) + return state_error; + buf++; + } + data <<= 1; + if ((data & 3) && verify_video_tail(&buf, buf_end, 4 - (data & 3))) + return state_error; + *buffer = buf; + return state_command; +} + +static __inline__ verifier_state_t +via_parse_vheader6( drm_via_private_t *dev_priv, uint32_t const **buffer, const uint32_t *buf_end ) +{ + + uint32_t addr, count, i; + const uint32_t *buf = *buffer; + + i = count = *++buf; + buf += 3; + while(i--) { + addr = *buf++; + VIA_WRITE(addr, *buf++); + } + count <<= 1; + if (count & 3) buf += 4 - (count & 3); + *buffer = buf; + return state_command; +} + + + +int +via_verify_command_stream(const uint32_t * buf, unsigned int size, drm_device_t *dev, + int agp) +{ + + drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private; + drm_via_state_t *hc_state = &dev_priv->hc_state; + drm_via_state_t saved_state = *hc_state; + uint32_t cmd; + const uint32_t *buf_end = buf + ( size >> 2 ); + verifier_state_t state = state_command; + int pro_group_a = dev_priv->pro_group_a; + + hc_state->dev = dev; + hc_state->unfinished = no_sequence; + hc_state->map_cache = NULL; + hc_state->agp = agp; + hc_state->buf_start = buf; + dev_priv->num_fire_offsets = 0; + + while (buf < buf_end) { + + switch (state) { + case state_header2: + state = via_check_header2( &buf, buf_end, hc_state ); + break; + case state_header1: + state = via_check_header1( &buf, buf_end ); + break; + case state_vheader5: + state = via_check_vheader5( &buf, buf_end ); + break; + case state_vheader6: + state = via_check_vheader6( &buf, buf_end ); + break; + case state_command: + if (HALCYON_HEADER2 == (cmd = *buf)) + state = state_header2; + else if ((cmd & HALCYON_HEADER1MASK) == HALCYON_HEADER1) + state = state_header1; + else if (pro_group_a && (cmd & VIA_VIDEOMASK) == VIA_VIDEO_HEADER5) + state = state_vheader5; + else if (pro_group_a && (cmd & VIA_VIDEOMASK) == VIA_VIDEO_HEADER6) + state = state_vheader6; + else { + DRM_ERROR("Invalid / Unimplemented DMA HEADER command. 0x%x\n", + cmd); + state = state_error; + } + break; + case state_error: + default: + *hc_state = saved_state; + return DRM_ERR(EINVAL); + } + } + if (state == state_error) { + *hc_state = saved_state; + return DRM_ERR(EINVAL); + } + return 0; +} + +int +via_parse_command_stream(drm_device_t *dev, const uint32_t * buf, unsigned int size) +{ + + drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private; + uint32_t cmd; + const uint32_t *buf_end = buf + ( size >> 2 ); + verifier_state_t state = state_command; + int fire_count = 0; + + while (buf < buf_end) { + + switch (state) { + case state_header2: + state = via_parse_header2( dev_priv, &buf, buf_end, &fire_count ); + break; + case state_header1: + state = via_parse_header1( dev_priv, &buf, buf_end ); + break; + case state_vheader5: + state = via_parse_vheader5( dev_priv, &buf, buf_end ); + break; + case state_vheader6: + state = via_parse_vheader6( dev_priv, &buf, buf_end ); + break; + case state_command: + if (HALCYON_HEADER2 == (cmd = *buf)) + state = state_header2; + else if ((cmd & HALCYON_HEADER1MASK) == HALCYON_HEADER1) + state = state_header1; + else if ((cmd & VIA_VIDEOMASK) == VIA_VIDEO_HEADER5) + state = state_vheader5; + else if ((cmd & VIA_VIDEOMASK) == VIA_VIDEO_HEADER6) + state = state_vheader6; + else { + DRM_ERROR("Invalid / Unimplemented DMA HEADER command. 0x%x\n", + cmd); + state = state_error; + } + break; + case state_error: + default: + return DRM_ERR(EINVAL); + } + } + if (state == state_error) { + return DRM_ERR(EINVAL); + } + return 0; +} + + + +static void +setup_hazard_table(hz_init_t init_table[], hazard_t table[], int size) +{ + int i; + + for(i=0; i<256; ++i) { + table[i] = forbidden_command; + } + + for(i=0; i<size; ++i) { + table[init_table[i].code] = init_table[i].hz; + } +} + +void +via_init_command_verifier( void ) +{ + setup_hazard_table(init_table1, table1, sizeof(init_table1) / sizeof(hz_init_t)); + setup_hazard_table(init_table2, table2, sizeof(init_table2) / sizeof(hz_init_t)); + setup_hazard_table(init_table3, table3, sizeof(init_table3) / sizeof(hz_init_t)); +} |